fix: do not transform ClassPrivateMethods in estree

eslint/babel-eslint-tests/test/integration/eslint/eslint.js

@@ -1758,6 +1758,28 @@ describe("verify", () => {
           { "no-unused-vars": 1 },
         );
       });
+
+      it("should visit params", () => {
+        verifyAndAssertMessages(
+          `export class C {
+              constructor() { this.#d(); }
+              #d(unused) {};
+            }
+          `,
+          { "no-unused-vars": 1 },
+        );
+      });
+
+      it("should visit body", () => {
+        verifyAndAssertMessages(
+          `export class C {
+              constructor() { this.#d(); }
+              #d() { var unused; };
+            }
+          `,
+          { "no-unused-vars": 1 },
+        );
+      });
     });
   });
 

packages/babel-parser/src/plugins/estree.js

@@ -287,6 +287,19 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       type: string,
       inClassScope: boolean = false,
     ): T {
+      if (type === "ClassPrivateMethod") {
+        // todo: supports ClassPrivateMethod
+        // see https://github.com/estree/estree/blob/master/experimental/class-features.md
+        return super.parseMethod(
+          node,
+          isGenerator,
+          isAsync,
+          isConstructor,
+          allowDirectSuper,
+          type,
+          inClassScope,
+        );
+      }
       let funcNode = this.startNode();
       funcNode.kind = node.kind; // provide kind, so super method correctly sets state
       funcNode = super.parseMethod(

packages/babel-parser/test/fixtures/estree/class-private-method/basic/input.js

@@ -0,0 +1,3 @@
+class A {
+  #foo(arg, ...others) {}
+}

packages/babel-parser/test/fixtures/estree/class-private-method/basic/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["flow", "jsx", "estree", "classPrivateMethods"]
+}

packages/babel-parser/test/fixtures/estree/class-private-method/basic/output.json

@@ -0,0 +1,68 @@
+{
+  "type": "File",
+  "start":0,"end":37,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":37,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start":0,"end":37,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+        "id": {
+          "type": "Identifier",
+          "start":6,"end":7,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":7},"identifierName":"A"},
+          "name": "A"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start":8,"end":37,"loc":{"start":{"line":1,"column":8},"end":{"line":3,"column":1}},
+          "body": [
+            {
+              "type": "ClassPrivateMethod",
+              "start":12,"end":35,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":25}},
+              "static": false,
+              "key": {
+                "type": "PrivateName",
+                "start":12,"end":16,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":6}},
+                "id": {
+                  "type": "Identifier",
+                  "start":13,"end":16,"loc":{"start":{"line":2,"column":3},"end":{"line":2,"column":6},"identifierName":"foo"},
+                  "name": "foo"
+                }
+              },
+              "kind": "method",
+              "id": null,
+              "generator": false,
+              "async": false,
+              "expression": false,
+              "params": [
+                {
+                  "type": "Identifier",
+                  "start":17,"end":20,"loc":{"start":{"line":2,"column":7},"end":{"line":2,"column":10},"identifierName":"arg"},
+                  "name": "arg"
+                },
+                {
+                  "type": "RestElement",
+                  "start":22,"end":31,"loc":{"start":{"line":2,"column":12},"end":{"line":2,"column":21}},
+                  "argument": {
+                    "type": "Identifier",
+                    "start":25,"end":31,"loc":{"start":{"line":2,"column":15},"end":{"line":2,"column":21},"identifierName":"others"},
+                    "name": "others"
+                  }
+                }
+              ],
+              "body": {
+                "type": "BlockStatement",
+                "start":33,"end":35,"loc":{"start":{"line":2,"column":23},"end":{"line":2,"column":25}},
+                "body": []
+              }
+            }
+          ]
+        }
+      }
+    ]
+  }
+}